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AJLogo Intro Commands
This describes the basic Commands of AJLogo.
I've spent time on the language and the demos but as of now, not the documentation.
I realize programing with AJLogo right now is a difficult task with no documentation.
However, please feel free to send mail or chat with me at the site.
It should be noted that this is a draft. Better tutorials, and reference material will be integrated into AJLogo as time goes on.
Cheers,
Arnie
Commands
Below are the base 'core' commands for AJLogo. There may be more options/arguments available for some commands but to keep it as clear as possible for now, the simplest use will be discussed.
Commands are generally typed into the brown text area.
| Commands | |||
|---|---|---|---|
| Command | Short for | Full Discription | Example |
| cs | clear screen | clears the current screen and sends the turtle 'home' and sets the pen 'down' | cs |
| home | home | places the turtle in the center of the screen (position 0,0) and sets the heading straight up ( 0 degrees). | home |
| fd | forward | draws a line x pixels long | fd 100 |
| bk | backward | draws a line backwards x pixels long | bk 100 |
| rt | right turn | changes the heading clockwise x degrees | rt 45 |
| lt | left turn | changes the heading counter clockwise x degrees | lt 30 |
| pd | pen down | when the pen is down lines are drawn when fd and bk are executed | pd |
| pu | pen up | when the pen is up fd and bk just move the turtle without drawing a line | pu |
| sh | set heading | sets the turtles direction (heading) from straight up x degrees clockwise (doesn't change position) | sh 60 |
| sp | set position | sets the turtles position to a particular point (doesn't hcange the heading) | sp 20,30 |
| st | show turtle | displays a triangle (turtle) which gives a sense of position and heading | st |
| ht | hide turtle | hides the turtle which allows faster drawing | ht |
| rp | repeat | repeats a list of commands x times | rp 5[ fd 100 rt 144 fd 100 lt 72 ] |
| pr | prints in the text area | pr hi | |
| list | list methods | prints out a listing of all methods (or procedures). The methods can be edited after listing | list |
| lprim | list primitives | This will print out a complete (but simple) listing of the numerous primitives. | lprim |
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